1/* 2 * Copyright (C) 2010 Bluecherry, LLC www.bluecherrydvr.com 3 * Copyright (C) 2010 Ben Collins <bcollins@bluecherry.net> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 */ 19 20#include <linux/kernel.h> 21#include <linux/fs.h> 22#include <asm/uaccess.h> 23 24#include "solo6010.h" 25 26static void solo_gpio_mode(struct solo6010_dev *solo_dev, 27 unsigned int port_mask, unsigned int mode) 28{ 29 int port; 30 unsigned int ret; 31 32 ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_0); 33 34 /* To set gpio */ 35 for (port = 0; port < 16; port++) { 36 if (!((1 << port) & port_mask)) 37 continue; 38 39 ret &= (~(3 << (port << 1))); 40 ret |= ((mode & 3) << (port << 1)); 41 } 42 43 solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_0, ret); 44 45 /* To set extended gpio - sensor */ 46 ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_1); 47 48 for (port = 0; port < 16; port++) { 49 if (!((1 << (port + 16)) & port_mask)) 50 continue; 51 52 if (!mode) 53 ret &= ~(1 << port); 54 else 55 ret |= 1 << port; 56 } 57 58 solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_1, ret); 59} 60 61static void solo_gpio_set(struct solo6010_dev *solo_dev, unsigned int value) 62{ 63 solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT, 64 solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) | value); 65} 66 67static void solo_gpio_clear(struct solo6010_dev *solo_dev, unsigned int value) 68{ 69 solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT, 70 solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) & ~value); 71} 72 73static void solo_gpio_config(struct solo6010_dev *solo_dev) 74{ 75 /* Video reset */ 76 solo_gpio_mode(solo_dev, 0x30, 1); 77 solo_gpio_clear(solo_dev, 0x30); 78 udelay(100); 79 solo_gpio_set(solo_dev, 0x30); 80 udelay(100); 81 82 /* Warning: Don't touch the next line unless you're sure of what 83 * you're doing: first four gpio [0-3] are used for video. */ 84 solo_gpio_mode(solo_dev, 0x0f, 2); 85 86 /* We use bit 8-15 of SOLO_GPIO_CONFIG_0 for relay purposes */ 87 solo_gpio_mode(solo_dev, 0xff00, 1); 88 89 /* Initially set relay status to 0 */ 90 solo_gpio_clear(solo_dev, 0xff00); 91} 92 93int solo_gpio_init(struct solo6010_dev *solo_dev) 94{ 95 solo_gpio_config(solo_dev); 96 return 0; 97} 98 99void solo_gpio_exit(struct solo6010_dev *solo_dev) 100{ 101 solo_gpio_clear(solo_dev, 0x30); 102 solo_gpio_config(solo_dev); 103} 104